need help customizing

I have a 1996, Buick Regal (custom), I been searching for after maket parts on the web; but I count find any upgrands for my 3100 engines, and also I'm looking for body kits for my car. Any information that you can send me, I would gladly apprenciated, I'm new at doing this, and it's my first time doing this modification on a vechile. So if you guys could help, I would like to hear from you.ty